Tactile switch for a mobile electronic device

ABSTRACT

A tactile switch on a mobile electronic device having a housing is provided. The tactile switch is comprised of a pressure sensitive interface on an exterior portion of the housing, a switch mechanism, and at least one pathway coupled to the pressure sensitive interface and extending from the pressure sensitive interface to the switch mechanism. The switch mechanism is at a remote location from the pressure sensitive interface. The pathway is formed in an interior portion of the housing. The tactile switch further includes a viscous fluid substantially filling the pathway. The tactile switch is configured such that when pressure is applied to the pressure sensitive interface, the viscous fluid exerts pressure on the switch mechanism, causing the switch to make an electrical contact.

FIELD OF THE INVENTION

The present invention relates to mobile electronic devices such as smart phones and handheld computers, and particularly to button switches on such devices.

BACKGROUND

Generally speaking as electronic devices become more mobile, portable, and smaller, these handheld electronic devices employ touch screens and touch gestures to operate features of the device. However, the need for traditional tactile button, or mechanical approach has not completely been eliminated.

Implementing traditional mechanical approach presents challenges. Often, an electronic device's internal components are competing for space which makes the mechanical approach particularly difficult to implement. The positioning of the input tactile buttons can lead to additional challenges such as RF interference or decreased durability.

Therefore, a need exists for tactile buttons for human input on handheld and portable electronic devices which have flexible positioning with respect to the switch or operation of the button controls, and which are efficient in the space they occupy within the device.

SUMMARY

Accordingly, in one aspect, the present invention embraces a tactile switch on a mobile electronic device.

In an exemplary embodiment, a tactile switch on a mobile electronic device having a housing, includes a pressure sensitive interface on an exterior portion of the housing, a switch mechanism, and at least one pathway coupled to the pressure sensitive interface and extending from the pressure sensitive interface to the switch mechanism. The switch mechanism is at a remote location from the pressure sensitive interface. The pathway is formed in an interior portion of the housing. Additionally, a viscous fluid substantially fills the pathway. The tactile switch is configured such that when pressure is applied to the pressure sensitive interface, the viscous fluid in the pathway exerts pressure on the switch mechanism, causing the switch to make an electrical contact.

In another exemplary embodiment, the switch mechanism is mechanical.

In another exemplary embodiment, the switch mechanism is a solid state pressure sensor.

In another exemplary embodiment, the pressure sensitive interface is differentially sensitive to different pressures applied to the pressure sensitive interface.

In yet another exemplary embodiment of the invention, the pathway is molded into the interior portion of the housing.

In another exemplary embodiment, the viscous fluid is a hydraulic fluid.

In another exemplary embodiment, the pressure sensitive interface is comprised of more than one pressure sensitive interface. The at least one pathway is comprised of one pathway corresponding to each pressure sensitive interface. The tactile switch further comprises additional switch mechanisms corresponding to each pressure sensitive interface.

In another exemplary embodiment, the pressure sensitive interface may be located on any part of the exterior portion of the housing.

In another exemplary embodiment, the pressure sensitive interface has a shape. The shape conforms to a contour of the exterior portion of the housing where the pressure sensitive interface is located.

In yet another exemplary embodiment of the invention, the tactile switch further comprises means to transmit vibration to the exterior housing when the electrical contact is made with the switch mechanism.

In another exemplary embodiment of the invention, the vibration is transmitted to the pressure sensitive interface.

In another exemplary embodiment, the means to transmit vibration is selected from a solenoid and a vibrator, the means being activated by the switch making the electrical contact.

In another exemplary embodiment of the invention, the pathways are sealed.

In yet another exemplary embodiment of the invention, the pressure sensitive interface is directionally sensitive to pressure. The at least one pathway is comprised of one pathway corresponding to each direction in which the pressure sensitive interface is directionally sensitive. The tactile switch further comprises additional switch mechanisms corresponding to each pathway.

In another exemplary embodiment of the invention, the tactile switch further comprises means to transmit vibrations to the exterior housing when the electrical contact is made with one of the switch mechanisms. The vibrations are varied in property depending on which switch mechanism caused the electrical contact.

In another exemplary embodiment of the invention, the vibration property is selected from amplitude and frequency.

In another exemplary embodiment of the invention, the exterior portion of the housing of the mobile electronic device is comprised of a resilient material. The pressure sensitive interface is comprised of the entire exterior portion of the housing.

In another aspect, the present invention embraces a tactile switch on a mobile electronic device having a housing; the tactile switch comprising a pressure sensitive interface on an exterior portion of the housing, a switch mechanism, and means for transferring pressure from the pressure sensitive interface to the switch mechanism such that pressure applied to the pressure sensitive interface causes the switch mechanism to make an electrical contact via the means for transferring pressure. The switch mechanism is at a remote location from the pressure sensitive interface.

In another exemplary embodiment, the means for transferring pressure comprises at least one pathway coupled to the pressure sensitive interface and extending from the pressure sensitive interface to the switch mechanism. The pathway is formed in an interior portion of the housing. The means further comprises viscous fluid substantially filling the pathway.

In another exemplary embodiment, the tactile switch further comprises a reservoir containing the viscous fluid. The reservoir is located between the pressure sensitive interface and the pathway.

The foregoing illustrative summary, as well as other exemplary objectives and/or advantages of the invention, and the manner in which the same are accomplished, are further explained within the following detailed description and its accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 schematically depicts a mobile device with three tactile switches in accordance with an exemplary embodiment of the present invention.

FIGS. 2a and 2b schematically depict a tactile switch in an inactivated state and in an activated state respectively in accordance with an exemplary embodiment of the present invention.

FIGS. 3a and 3b schematically depict another tactile switch in an inactivated state and in an activated state respectively in accordance with another exemplary embodiment of the present invention.

FIGS. 4a and 4b schematically depict a further tactile switch in an inactivated state and in an activated state respectively in accordance with another exemplary embodiment of the present invention.

DETAILED DESCRIPTION

The present invention embraces a tactile switch for an electronic mobile device. FIG. 1 illustrates a mobile electronic device with three tactile switches in accordance with the present invention.

In an exemplary embodiment, referring to FIG. 1, a mobile electronic device (10) is provided with a housing (12) and a touchscreen (14). Pressure sensitive interfaces (22, 32, and 42) for tactile switches according to the present invention are provided as part of the housing or on an exterior portion of the housing (12). For example, pressure sensitive interface (42) is shaped to the contour of the housing of the mobile electronic device (10). Pressure sensitive interface (32) is flush with the housing (12) of the mobile electronic device (10). Pressure sensitive interface (22) is slightly elevated from the housing (12) of the mobile electronic device (10). The pressure sensitive interfaces (32) and (22) will be discussed in more detail in conjunction with FIGS. 2 and 3 respectively below. The housing (12) and the pressure sensitive interfaces (22, 32, 42) may be made of resilient material.

Referring now to FIG. 2a , in an exemplary embodiment of the present invention, the tactile switch (30) is comprised of a pressure sensitive interface (32), a switch mechanism (36) at a remote location from the pressure sensitive interface (32), and a pathway (34) coupled to the pressure sensitive interface (32) and extending from the pressure sensitive interface (32) to the switch mechanism (36). A reservoir (37) is provided between the pressure sensitive interface (32) and the pathway (34). The pathway (34) is formed in an interior portion of the housing. For example, the pathway may be etched or molded into a plastic housing of the mobile electronic device. Alternatively the pathway could be molded in another interior parts of the mobile device, thus saving valuable real estate.

Referring to FIG. 2b , in an exemplary embodiment, viscous fluid (38) fills the reservoir (37) and the pathway (34). In the Figure, the pressure sensitive interface (32) is shown as being depressed, which causes the viscous fluid (38) to exert pressure on the switch mechanism (36), causing the switch mechanism (36) to make an electrical contact.

In another exemplary embodiment, the tactile switch (30) also includes a vibration device (39). The vibration device (39), for example, may be a solenoid or a vibrator. The vibration device (39) is activated when the switch mechanism (36) makes an electrical contact. The vibration device (39) may be mechanically coupled to the pathway (34) such that vibration is transmitted to the pressure sensitive interface (32).

Referring now to FIG. 3a , tactile switch (20) is schematically shown. In an exemplary embodiment, tactile switch (20) is comprised of pressures sensitive interface (22), reservoirs (37 a and 37 b), pathways (34 a and 34 b), corresponding to reservoirs (37 a and 37 b), and switch mechanism (36). In the exemplary embodiment, the pressure sensitive interface (22) is actually comprised of two pressure sensitive interfaces (22 a and 22 b). Thus, tactile switch (20) is actually two switches or a switch with dual functions.

In another exemplary embodiment, referring to FIG. 3b , pressure sensitive interface (22 a) is depressed. Viscous fluid (38) in reservoir (37 a) is forced down pathway (34 a) to exert pressure on switch mechanism (36). The pathways (34 a and 34 b) may be formed in an interior portion of the housing. For example, the pathways (34 a and 34 b) may be etched or molded into a plastic housing of the mobile electronic device. Alternatively the pathways (34 a and 34 b) could be molded in other interior parts of the mobile device, thus saving valuable real estate.

In another exemplary embodiment, the tactile switch (20) is provided with vibration devices (39 a and 39 b). The vibration devices (39 a and 39 b), for example may be solenoids or vibrators. One of the vibration devices (39 a or 39 b) is activated when the switch mechanism (36) makes an electrical contact, depending on whether pressure sensitive interface (22 a or 22 b) is depressed. The vibration devices (39 a or 39 b) may be mechanically coupled to the pathways (34 a and 34 b) such that vibration is transmitted to the corresponding pressure sensitive interface (22 a or 22 b).

In another exemplary embodiment, the vibrations are varied in property depending on which pressure sensitive interface (22 a or 22 b) is depressed. The property variation can be one of frequency or amplitude, which is transmitted to the pressure sensitive interface (22 a or 22 b) via the viscous fluid (38) in the corresponding pathway (34 a or 34 b).

In another exemplary embodiment, the tactile switch's pressure sensitive interface is directionally sensitive to pressure. The pathway comprises one pathway corresponding to each direction in which the pressure sensitive interface is directionally sensitive. The tactile switch further is provided with additional switch mechanisms corresponding to each pathway. Referring to FIG. 4a , the tactile switch (50) is provided with a pressure sensitive interface (52) which is directionally sensitive to pressure. In the Figure, the directional sensitivity is designated by arrowheads (59 a-59 h) on the surface of the pressure sensitive interface (52), however these are present in the Figure for merely illustrative purposes and would not necessarily be present on an actual device. The tactile switch (50) also includes pathways (54 a-54 d), switch mechanisms (56 a and 56 b) and viscous fluid (58) in the pathways. Switch mechanisms (56 a and 56 b) each have two possible electrical contact positions, corresponding to the four pathways (54 a-54 d). In FIG. 4a , when the pressure sensitive interface (52) is pressed in the direction of the blackened arrow head (59 a), viscous fluid (58) flows in pathways (54 b and 54 c) to exert pressure on the switch mechanisms (56 a and 56 b) to make an electrical connection. Similarly, in other exemplary embodiments, depressing the pressure sensitive interface (52) in the (59 b) direction results in viscous fluid (58) flow in pathway (54 c); or in direction (59 c) results in viscous fluid (58) flow in pathways (54 b and 54 c); or in the direction (59 d) results in viscous fluid (58) flow in pathways (54 d); or in direction (59 e) results in viscous fluid (58) flow in pathways (54 a and 54d); or in the direction (59 f) results in viscous fluid (58) flow in pathways (54 a); or in direction (59 g) results in viscous fluid (58) flow in pathways (54 a and 54 c).

Referring now to FIG. 4b , in another exemplary embodiment, on the tactile switch (50), the pressure sensitive interface (52) is depressed the direction of blackened arrow head (52 h). This depression causes viscous fluid (58) to flow through pathway (54 b) to exert pressure on switch mechanism (56 a) to make an electrical contact.

In another exemplary embodiment, in all the foregoing examples, the switch mechanism, when making electrical contact, activates some feature of the electronic mobile device.

The following represent additional exemplary embodiments.

Embodiment 1

A tactile switch on a mobile electronic device having a housing, comprising:

a pressure sensitive interface on an exterior portion of the housing;

a switch mechanism, the switch mechanism being at a remote location from the pressure sensitive interface;

at least one pathway coupled to the pressure sensitive interface and extending from the pressure sensitive interface to the switch mechanism, the pathway being formed in an interior portion of the housing;

a viscous fluid substantially filling the pathway; and

the tactile switch being configured such that when pressure is applied to the pressure sensitive interface, the viscous fluid exerts pressure on the switch mechanism, causing the switch to make an electrical contact.

Embodiment 2

The tactile switch of Embodiment 1, wherein the switch mechanism is mechanical.

Embodiment 3

The tactile switch of Embodiment 1, wherein the switch mechanism is a solid state pressure sensor.

Embodiment 4

The tactile switch of Embodiment 1, wherein the pathway is molded into the interior portion of the housing.

Embodiment 5

The tactile switch of Embodiment 3, wherein the pressure sensitive interface is differentially sensitive to different pressures applied to the pressure sensitive interface.

Embodiment 6

The tactile switch of Embodiment 1, wherein the viscous fluid is a hydraulic fluid.

Embodiment 7

The tactile switch of Embodiment 1, wherein the pressure sensitive interface comprises more than one pressure sensitive interface; wherein the at least one pathway comprises one pathway corresponding to each pressure sensitive interface; the tactile switch further comprising additional switch mechanisms corresponding to each pressure sensitive interface.

Embodiment 8

The tactile switch of Embodiment 1, wherein the pressure sensitive interface may be located on any part of the exterior portion of the housing.

Embodiment 9

The tactile switch of Embodiment 1, wherein the pressure sensitive interface has a shape, the shape conforming to a contour of the exterior portion of the housing where the pressure sensitive interface is located.

Embodiment 10

The tactile switch of Embodiment 1, further comprising means to transmit vibration to the exterior housing when the electrical contact is made with the switch mechanism.

Embodiment 11

The tactile switch of Embodiment 10, wherein the vibration is transmitted to the pressure sensitive interface.

Embodiment 12

The tactile switch of Embodiment 10, wherein the means to transmit vibration is selected from a solenoid and a vibrator, the means being activated by the switch making the electrical contact.

Embodiment 13

The tactile switch of Embodiment 1, wherein the pathways are sealed.

Embodiment 14

The tactile switch of Embodiment 1, wherein the pressure sensitive interface is directionally sensitive to pressure, and wherein the at least one pathway comprises one pathway corresponding to each direction in which the pressure sensitive interface is directionally sensitive; the tactile switch further comprising additional switch mechanisms corresponding to each pathway.

Embodiment 15

The tactile switch of Embodiment 14, further comprising means to transmit vibrations to the exterior housing when the electrical contact is made with one of the switch mechanisms, the vibrations being varied in property depending on which switch mechanism caused the electrical contact.

Embodiment 16

The tactile switch of Embodiment 15, wherein the property is selected from amplitude and frequency.

Embodiment 17

The tactile switch of Embodiment 1, wherein the exterior portion of the housing of mobile electronic device is comprised of a resilient material; and wherein the pressure sensitive interface is comprised of the entire exterior portion of the housing.

Embodiment 18

A tactile switch on a mobile electronic device having a housing, comprising:

a pressure sensitive interface on an exterior portion of the housing;

a switch mechanism, the switch mechanism being at a remote location from the pressure sensitive interface;

means for transferring pressure from the pressure sensitive interface to the switch mechanism, such that pressure applied to the pressure sensitive interface causes the switch mechanism to make an electrical contact.

Embodiment 19

The tactile switch of 18, wherein the means for transferring pressure comprises,

at least one pathway coupled to the pressure sensitive interface and extending from the pressure sensitive interface to the switch mechanism, the pathway being formed in an interior portion of the housing; and

viscous fluid substantially filling the pathway.

Embodiment 20

The tactile switch of Embodiment 18, wherein the switch mechanism is mechanical.

Embodiment 21

The tactile switch of Embodiment 18, wherein the switch mechanism is a solid state pressure sensor.

Embodiment 22

The tactile switch of Embodiment 19, wherein the pathway is molded into the interior portion of the housing.

Embodiment 23

The tactile switch of Embodiment 21, wherein the pressure sensitive interface is differentially sensitive to different pressures applied to the pressure sensitive interface.

Embodiment 24

The tactile switch of Embodiment 19, wherein the viscous fluid is a hydraulic fluid.

Embodiment 25

The tactile switch of Embodiment 19, wherein the pressure sensitive interface comprises more than one pressure sensitive interface; and wherein the at least one pathway comprises one pathway corresponding to each pressure sensitive interface; the tactile switch further comprising additional switch mechanisms corresponding to each pressure sensitive interface.

Embodiment 26

The tactile switch of Embodiment 18, wherein the pressure sensitive interface may be located on any part of the exterior portion of the housing.

Embodiment 27

The tactile switch of Embodiment 18, wherein the pressure sensitive interface has a shape, the shape conforming to a contour of the exterior portion of the housing where the pressure sensitive interface is located.

Embodiment 28

The tactile switch of Embodiment 18, further comprising means to transmit vibration to the exterior housing when the electrical contact is made with the switch mechanism.

Embodiment 29

The tactile switch of Embodiment 28, wherein the vibration is transmitted to the pressure sensitive interface.

Embodiment 30

The tactile switch of Embodiment 28, wherein the means to transmit vibration is selected from a solenoid and a vibrator, the means being activated by the switch making the electrical contact.

Embodiment 31

The tactile switch of Embodiment 19, wherein the pathways are sealed.

Embodiment 32

The tactile switch of Embodiment 19, wherein the pressure sensitive interface is directionally sensitive to pressure, and wherein the at least one pathway comprises one pathway corresponding to each direction in which the pressure sensitive interface is directionally sensitive; the tactile switch further comprising additional switch mechanisms corresponding to each pathway.

Embodiment 33

The tactile switch of Embodiment 32, further comprising means to transmit vibrations to the exterior housing when the electrical contact is made by one of the switch mechanisms, the vibrations being varied in property depending on which switch mechanism caused the electrical contact.

Embodiment 34

The tactile switch of Embodiment 33, wherein the property is selected from amplitude and frequency.

Embodiment 35

The tactile switch of Embodiment 18, wherein the exterior portion of the housing of mobile electronic device is comprised of a resilient material; and wherein the pressure sensitive interface is comprised of the entire exterior portion of the housing.

Embodiment 36

The tactile switch of Embodiment 1, further comprising a reservoir containing the viscous fluid located between the pressure sensitive interface and the pathway.

Embodiment 37

The tactile switch of Embodiment 19, further comprising a reservoir containing the viscous fluid located between the pressure sensitive interface and the pathway.

To supplement the present disclosure, this application incorporates entirely by reference the following commonly assigned patents, patent application publications, and patent applications:

To supplement the present disclosure, this application incorporates entirely by reference the following patents, patent application publications, and patent applications:

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In the specification and/or figures, typical embodiments of the invention have been disclosed. The present invention is not limited to such exemplary embodiments. The use of the term “and/or” includes any and all combinations of one or more of the associated listed items. The figures are schematic representations and so are not necessarily drawn to scale. Unless otherwise noted, specific terms have been used in a generic and descriptive sense and not for purposes of limitation. 

1. A tactile switch on a mobile electronic device having a housing, comprising: a pressure sensitive interface on an exterior portion of the housing; a switch mechanism, the switch mechanism being at a remote location from the pressure sensitive interface; at least one pathway coupled to the pressure sensitive interface and extending from the pressure sensitive interface to the switch mechanism, the pathway being formed in an interior portion of the housing; a viscous fluid substantially filling the pathway; and the tactile switch being configured such that when pressure is applied to the pressure sensitive interface, the viscous fluid exerts pressure on the switch mechanism, causing the switch to make an electrical contact.
 2. The tactile switch of claim 1, wherein the switch mechanism is mechanical.
 3. The tactile switch of claim 1, wherein the switch mechanism is a solid state pressure sensor.
 4. The tactile switch of claim 1, wherein the pathway is molded into the interior portion of the housing.
 5. The tactile switch of claim 3, wherein the pressure sensitive interface is differentially sensitive to different pressures applied to the pressure sensitive interface.
 6. The tactile switch of claim 1, wherein the viscous fluid is a hydraulic fluid.
 7. The tactile switch of claim 1, wherein the pressure sensitive interface comprises more than one pressure sensitive interface; wherein the at least one pathway comprises one pathway corresponding to each pressure sensitive interface; the tactile switch further comprising additional switch mechanisms corresponding to each pressure sensitive interface.
 8. The tactile switch of claim 1, wherein the pressure sensitive interface has a shape, the shape conforming to a contour of the exterior portion of the housing where the pressure sensitive interface is located.
 9. The tactile switch of claim 1, further comprising a vibration device to transmit vibration to the exterior housing when the electrical contact is made with the switch mechanism.
 10. The tactile switch of claim 9, wherein the vibration is transmitted to the pressure sensitive interface.
 11. The tactile switch of claim 9, wherein the vibration device is selected from a solenoid and a vibrator, the vibration device being activated by the switch making the electrical contact.
 12. A tactile switch on a mobile electronic device having a housing, comprising: a pressure sensitive interface on an exterior portion of the housing; a switch mechanism, the switch mechanism being at a remote location from the pressure sensitive interface; means for transferring pressure from the pressure sensitive interface to the switch mechanism, such that pressure applied to the pressure sensitive interface causes the switch mechanism to make an electrical contact.
 13. The tactile switch of 12, wherein the means for transferring pressure comprises, at least one pathway coupled to the pressure sensitive interface and extending from the pressure sensitive interface to the switch mechanism, the pathway being formed in an interior portion of the housing; and viscous fluid substantially filling the pathway.
 14. The tactile switch of claim 12, wherein the switch mechanism is mechanical.
 15. The tactile switch of claim 12, wherein the switch mechanism is a solid state pressure sensor.
 16. The tactile switch of claim 13, wherein the pathway is molded into the interior portion of the housing.
 17. The tactile switch of claim 15, wherein the pressure sensitive interface is differentially sensitive to different pressures applied to the pressure sensitive interface.
 18. The tactile switch of claim 13, wherein the viscous fluid is a hydraulic fluid.
 19. The tactile switch of claim 13, wherein the pressure sensitive interface comprises more than one pressure sensitive interface; and wherein the at least one pathway comprises one pathway corresponding to each pressure sensitive interface; the tactile switch further comprising additional switch mechanisms corresponding to each pressure sensitive interface.
 20. The tactile switch of claim 12, further comprising a vibration device to transmit vibration to the exterior housing when the electrical contact is made with the switch mechanism. 